材料科学
结晶度
化学工程
柠檬酸
延伸率
阴极
聚苯乙烯
相(物质)
钠
纳米颗粒
粒子(生态学)
粒径
正交晶系
纳米技术
复合材料
冶金
晶体结构
聚合物
有机化学
工程类
物理化学
地质学
化学
极限抗拉强度
海洋学
作者
Xin He,Jun Wang,Bao Qiu,Elie Paillard,Chen Ma,Xia Cao,Haodong Liu,Marian Cristian Stan,Haidong Liu,Tobias Gallash,Ying Shirley Meng,Jie Li
出处
期刊:Nano Energy
[Elsevier]
日期:2016-09-01
卷期号:27: 602-610
被引量:125
标识
DOI:10.1016/j.nanoen.2016.07.021
摘要
Monocrystalline orthorhombic Na0.44MnO2 nanoplate as a potential cathode material for sodium-ion batteries has been synthesized by a template-assisted sol-gel method. It exhibits high crystallinity, pure phase and homogeneous size distribution. During the synthesis, acidic and reductive conditions are applied to limit the production of unfavorable Birnessite phase in the precursor, and colloidal polystyrene is included to avoid morphology collapse during the gel formation and particle elongation in one direction. The decompositions of polystyrene and citric acid during high temperature firing offer a reductive carbothermal condition which can suppress the formation of unidimensional particles, and limit particle growth along the [001] direction. As a consequence, the material delivers 96 mAh g−1 discharge capacity at 10 C (86% of 0.1 C capacity) and maintains 97.8% capacity after 100 cycles at 0.5 C. Such superior rate capability and cycling stability of this material are among the best to date, suggesting its great interest in practical applications.
科研通智能强力驱动
Strongly Powered by AbleSci AI